Hyaluronidase Dosage for Removing Restylane Under Eyes

I have an appointment this week to have restylane under my eyes dissolved with hyaluronidase, and I like to be informed as much as possible before having anything done. I would appreciate advice on the dosage so that when i ask how much my doctor intends to use I have something to weigh this up against. The last thing I want is more complications caused by an incorrect mixture/amount of hyaluronidase being injected. Many thanks in advance. Samuele